How popular is Arsino?

Arsino is a rare given name for males. Arsino is an equally rare surname for both adults and children. (2000 U.S. CENSUS)

Which version is better?

The only prominent variation form of Arsino (NOT RANKED) rated in the Top 2000 is Arsenio. Other forms, like Arseni, are uncommon. Adoption of this form of Arsino was common in the year 1990 (#743). (2016 U.S. SSA RECORDS)